Steam-boiler.



PATENTED SEPT. 24, 1907.

3 SHEETS-SHEET 1.

S. S. DAVIS. STEAM BOILER. APPLICATION FILED Dna; 5, 190e.

Vim/5555;

j [NVE/V701?.

ATTORNEYS mqszg. PATBNTED SEPT. 24, 1907. s. s. DAVIS.

STEAM BOILBR.

APPLICATION FILED DEU.5,19K6.

3 SHEETS-SHEET 2.

4 TTORNEYS N0. 866,629. PATBNTED SEPT. 24, 190.7..

- s. s. DAVIS. v STEAM BOILBR.' APPLICATION FIL'ED DBO. 5. 1906.

a sHEBTs-SHBET'S.

- A TTRNE Ys ing from the spirit or sacrificing,1 any of the advantages.

SAMUEL s. DAVIS,

OF SIDNEY, OHIO.

STE AM-B OILER.

le it known that l, SAMUEL S. Davis, a citizen ol the United' States, residing at Sidney, in the county ol Shelby and (State of Ohio, have invented a new and useful Steannlloiler, of which the following is a specification.

'This invention relate.- to the construction of that class of ste-ani boilers knotvn as flashers; wherein small quantities oi water are sprayed against heated metallic surfaces and instantly converted into steam.

The principal object of 'the invention is to provide a flasher in which the steam may be kept' thoroughly dry and may be superheated, il necessary, to the point of deconiposiiimi, so as to forni a dry gas.

A iurlher'object of the invention is to provide a boiler in which no water whatever will be retained within the boiler, so that the heat may be utilized'ior the purpose ol raising the niet-al of the boiler to a high temperature.

A still further object of the invention is to provide a pluru. ity o banks of flash tubes into which small quantities of water are sprayed alternately, the steam thus ormedbeing conducted through auxiliary tubes for the purpose o superheating and drying the same. I

A still further object of the invention is to provide novel means for feeding or forcing small quantities of water, together with air under pressure, alternately into the banks of tubes, the air' serving in part as a means for atomizing and finely dividingl the water.

`Witli these and other objects in view, as will more fully hereinafter appear, the invention consists in cervous changes in the form, proportions, size and minor details of the structure may be made without departof the invention.

In 'the accompanying drawings:-Figure I is an elevation of a steam boiler constructed in accordance vwith the invention, the outer shell or casing being shown in section. Fig. 2 is -a transverse sectional elevation oi the same. Fig; 3 is a detail -plan view showing one of the sets of flashers and the connections. Fig. 4 is a sectional elevation through one of the upper flasher tubes .staybolts 15 so arranged as to permit convenient open- Specication of Letters Patent.

Patented Sept. 24, 1907.

Application fried December 6.1906. semi No. 346,471.

ing of the casing when access is to be had to the interior thereof. i

At the bottom of the casing is a suitable heating. means lll which may take the forni of vapor or gas burners or any other kind oi fuel may be used as desired.

'lhe flasher tubes are arranged in two banks, the lowerrnost bank 18 having tubes of a less number than the upper bank 19, and the tubes oi one bank are stag` gered with relation to those of the other, so that the products of combustion may pass between the tubes of the lower bank and iinpinge directl y against those oi the upper bank. of tubes 2O which are staggered with relation to 'the tubes 19, and are preferably of a number greater than the number ol tubes in either thebank 18 or the bank 19.

Arranged in front of the flasher tubes 1S and 19 are transversely extending feeder tubes 21 and 22, troni which extend spraying nipples 23, these passing through suitable stulling boxes 24 which fit within openings formed in hollow plugs 25 that are welded in` the front ends ol the flasher tubes. The nipples may be o any desired construction, but preferably are provided with minute openings at their inner ends, through which interiningled volumes of air and water are directed, the water being atornii/.ed or finely di-l vided, and directed into Contact with the heated walls of the tubes where it'instantly flashes into steam.

' The rear ends of the flasher tubes are provided with welded plugs 26 from which project nipples 27 that are connected to horizontally disposed pipes 29. Each of these tubes is closed at one end by a plug 31, and at the opposite end is connected to a. vertically disposed tube 32, the latter being provided at its lower end with a blow ofi cock 33, and at its upper end with a safety -valye 345 of any ordinary construction. A

Connected to the vertical tube 32 is a third horizontal tube ,36'which is connected by short nipples 3,7 to the rear ends of the upper bank of-tubes 20, all of the steam formed in the lower flasher tubes 18 and 19 being conducted through the upper bank of tubes 20, and there partly dried and superheated. The front ends of the tubes 20 are connected to a transversely extending tube 38 which is connected to one end of, the lowermost of a series of connected banks of tubes 40, these tubes being of a size rnueh smaller than the Hasher tubes, and being connected in a continuous series, the steam entering one end of the lowermost bank and escaping from the opposite end of the toprnost bank and from there passing to the engine or other point. The smaller tubes extend completely across the upper portion of the combustion chamber, and the tubes of the different rows, being arranged in staggered relation, form barriers or ballles which will to some extent tend to retard the escape the products of combustion, so that the tubos may be Above the upper bank is a thirdset g Beerse@ very highly heated, and the steam from l he ilzuihera willA be dried and Superheated, the temperature being raised to any desired extent, sometimes to zi/point Where ytheV steam (leeoinposes into its; constituent elements and iorrus n very dry gee ouder high pressure.

The water to be uned in 'l he formation of steam is supplied from u tank 50 which .may be loezueil at any ron- Venient-point. From the bottom of the leuk lends a vali/ed discharge pipe'l containing, also, :i one way 1() cheek vulve 52, this pipe beingr eonneeted to the lower end oi the Cylinder` of arpuinp 53 whii'h muy ne of any ordinary eonstruetion, the upward movement of the pis ton serving to draw Water from the trink through the pipe 5I into the eyliuderof the pump. The witter is [5 discharged from the cylinder through a pipe having a, `one way cheek valve 55, and is delivered into :1 small pressure reservoir 5G, iroxn whence ii; flows through is pipe 57 to a feed wulerlieaer 58, the lutter being formed of a number oi rows o tubes which are placed shove the superhenting tube 40 und are exposed to the action oi the produeis of CombustionA` so that the heatniey be utilized to raise the temperature-of the'feed Water in ad: vence of the forcing o such water into the flasher tuhes. -The chamber 5G is employed hir the purpose of insuring a. steady flew oi'the feed Water, this 'chamber being always maintained full by the action ei the pump.

v Should there be any decrease in the quantity of steam used, and theeupply of Water fed te the boiler reduced7 l the pump 53 may continue to operate, nd` the eur-plus water will return through a bypass provided with a one way cheek vulve 5 9. The heated eter pushes from the leed vater heater 58 to a pipe (30 rhat is branched to form two discharges 6l and 62, the paaswge of water u) these being under the control of independent valves (i3A 3b The water discharges into trinke (ifi land (l5, respectively,

and the tops of these tanks are open or provided with perforations 66 to permit the inflow of :tir to ,mingle with the Water.y Below the chambers 64 and (i5 is e, double acting pump (56, the opposite ends ei the pump cylinder being,7 ronnected by pipes ($7 und G8 to the chambers 64 and 65reepectively, and in euch of these pipes is e one way cheek vulve 69 opening iu the direction o the pump cylinder. Y l The pump cylinder is arranged to contain a piston of any ordinary construction end arranged to operate in any ordinary'manner, and one en d of the pump is een neeted by :t pipe 70 to the leerl tube 2l of the lower lrlashers. und the other end of the cylinder is connected 1' by :i pipe 72 lo the feed pipe 22 oi the upper set, of flush ers, Euch o'i these pipes 70 und 72 Contains n one Way elieixli valve 73I opening; in ilu; direction o1n the flashers. in the operatimi "ul [him portion oi the mechanism the water und uit will be drawn alternately from the chaluhers G4 and G5 iuio the pump cylinder, :unl from thence will be discharged through the pipes to the llnshers! the supply oi mingled uir und Water being forced ztltermately to the upper und lower flashers, and the wetter instantly flashing into ste-urn which is afterwards con veyed through the superheeting coils und finally passes outtluough the main eteiun pipe to the engine orother point where it is to he utilized l. in n tlnvsher, the combination with n easing, of u pair of bunks oi' Hustler tubes arranged therein, the tubes of one hunk helm: staggered with relation to those of the @other hunk. fr honk of superheatln'r; tubes arranged above vthe usher tubes und receiving the steam from hoth banks of the letter, :1nd menne; for forcing jets of Writer ailiernutely into the upper und lower banks of flasher tubes.

L'. In n flasher, the mrnbnntion with u easing, of :i pair ol' superpoeed banks of harsher tubes arranged therein, the toben ol one hunk being staggered with relation 1.o those of the other jrank, n bank o' superheating tubes arranged above the flasher tubes and receiving the Steam from hoih banks of flasher tubes, the tubes of the superheutlngg bunk being stuggered with relation to the lIuShvr tubes, of the other bunk, :lud means for forcing a, mingle-d stream of air und writer alternately into the bunker of ilasher tubes,

In n flasher. the combination with 1 easing, of n pair of banks oi usher tubes arranged therein, n bank of superheeilng tubes urruuged above the llauher tubes and reeelvng the steam therefrom, n superheating coil uri-ringed nhoye und connected te the superheutng tuhes,. :inauditiomil coil arranged above the superheating coil und forining a feed wateriheuter, meunsvfer forcing werker through the feed wafer heater, means [or alternately forcing water from the {eu} writer heater to ihe banks of flasher tubes, und means for lntermlnglng-ul with the water in ad vanne of ite eutijauc'e to such fhuher tubes.

In testimony that I claim the 'Pori-,going as my own. l hrive hereto allned my signature in the presence of two wltnessef. v l

f SAMUEL s. DAV-is.

Witnesses z WM. lienmuuii/tn, Jr., Fimo. For. 

